Carbon dioxide buffer vessel process design
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsYufeng Qian, Pierre-Philippe Guerif, Alexander Roesch
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Abstract
A method of maintaining a syngas composition ratio during an upset condition, including detecting a reduction in the import carbon dioxide flow rate with a carbon dioxide import stream flow sensor, evaluating the reduction in carbon dioxide flow rate or carbon dioxide pressure in a controller, performing one or more predetermined corrective actions as instructed by the controller. Wherein the predetermined corrective actions are chosen from the following: opening a CO2 import stream flow valve, opening a hydrocarbon and steam stream feed valve, opening a CO2 backup stream control valve, opening a syngas backup letdown valve, and starting a composition adjustment unit.
Claims11
A method of maintaining a syngas composition ratio during an upset condition, comprising:
- detecting a reduction in the import carbon dioxide feed stream flow rate with a carbon dioxide import stream flow sensor,
- detecting reduction in carbon dioxide pressure with a carbon dioxide pressure sensor,
- evaluating the reduction in carbon dioxide flow rate or carbon dioxide pressure in a controller,
- performing one or more predetermined corrective actions as instructed by the controller,
- wherein the predetermined corrective actions are chosen from a list consisting of:
- opening a carbon dioxide import stream flow valve,
- opening a hydrocarbon and steam stream feed valve,
- opening a carbon dioxide backup stream control valve,
- opening a syngas backup letdown valve, and
- starting a composition adjustment unit,
- wherein the composition adjustment unit comprises a membrane separation unit, and wherein the composition adjustment unit is started when there is about 10 minutes of remaining carbon dioxide inventory, and
- wherein the composition adjustment unit is then started based on the remaining carbon dioxide inventory.
Dependencies are inferred from the claim text.